En:[en ai] refers to the "mutual love between a couple", [en qing] is "deep affection". [en ren] refers to "the person one who has received help from". A prominent personality in history: ZHOU Enlai , the first Premier of the People's Republic of China.

The 台文中文-dictionary linked to from the etymology page www.internationalscientific.org lists "un" as one of the pronunciations of 恩. I'm pretty sure that your remark about "uncertainty" refers only to the proper pronunciation of the character in Hainanese - the character is in any case correct, as I'm sure you are sure of too.

So, "Oon" would be a prefectly good spelling for it, if the pronunciation is correct. I had a uncle by marriage called "Oon Huat", and it could very well have been this character too.

Amazing what these spammers will do. The latest one seems not even to spam, but just say random things...